People with AIDS also have HIV, as HIV is the first stage of AIDS. Learn about the differences, how the conditions overlap, ...

Erectile dysfunction affects over 40% of men over 40, yet our understanding of the condition remains limited. Research on this issue has mostly relied on real organs, making it difficult to study the ...

Although they may question when and how, most scientists accept that human immunodeficiency virus (HIV)-1 came from simian immunodeficiency virus (SIV) carried in the chimpanzee subspecies Pan ...